Baseline Widely available
setUTCMonth()
㯠Date
ã¤ã³ã¹ã¿ã³ã¹ã®ã¡ã½ããã§ãåå®ä¸çæã«åºã¥ããæå®ãããæ¥æã®ãæããè¨å®ãã¾ãã
const event = new Date("December 31, 1975 23:15:30 GMT-3:00");
console.log(event.toUTCString());
// äºæ³ãããçµæ: "Thu, 01 Jan 1976 02:15:30 GMT"
console.log(event.getUTCMonth());
// äºæ³ãããçµæ: 0
event.setUTCMonth(11);
console.log(event.toUTCString());
// äºæ³ãããçµæ: "Wed, 01 Dec 1976 02:15:30 GMT"
æ§æ
setUTCMonth(monthValue)
setUTCMonth(monthValue, dateValue)
弿°
monthValue
1 æãã 12 æã表ã 0 ãã 11 ã¾ã§ã®éã®æ´æ°å¤ã
dateValue
çç¥å¯
ãæ¥ãã表ã 1 ãã 31 ã¾ã§ã®éã®æ´æ°å¤ã
ãã®å ´ã§ Date
ãªãã¸ã§ã¯ãã夿´ããæ°ããã¿ã¤ã ã¹ã¿ã³ããè¿ãã¾ãã弿°ã NaN
ï¼ã¾ã㯠undefined
ãªã©ã NaN
ã«å¤æããããã®ä»ã®å¤ï¼ã®å ´åãæ¥ä»ã¯ç¡å¹ãªæ¥æã«è¨å®ããã NaN
ãè¿ããã¾ãã
dayValue
弿°ãæå®ããªãå ´åãgetUTCDate()
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æå®ããå¤ãæå¾
ãããæ¥æã®ç¯å²å¤ã®å ´åãããã«å¿ã㦠setUTCMonth()
ã Date
ãªãã¸ã§ã¯ãã®æ¥ä»æ
å ±ã®æ´æ°ã試ã¿ã¾ããä¾ãã°ãmonthValue
ã« 15 ãæå®ããå ´åãå¹´ã« 1 ãå ç®ãããæã 3 ã«ãªãã¾ãã
const theBigDay = new Date();
theBigDay.setUTCMonth(11);
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